const isCodeCar = function(carId){
  let sId = carId;
  if (sId.length == 15) {
    if(!/^\d{14}(\d|x)$/i.test(sId)){
      return {isCarId: false, message: "你输入的身份证长度或格式错误"};
    } else  {
        sId=sId.substr(0,6)+'19'+sId.substr(6,9);
        sId+= getVCode(sId);
    }
  }
  function getVCode(CardNo17) {
    let Wi = new Array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2,1);
    let Ai = new Array('1','0','X','9','8','7','6','5','4','3','2');
    let cardNoSum = 0;
    for (let i=0; i<CardNo17.length; i++)cardNoSum+=CardNo17.charAt(i)*Wi[i];
    let seq = cardNoSum%11;
    return Ai[seq];
  }
  let aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"} ;

  let iSum=0 ;
  let info="" ;
  if(!/^\d{17}(\d|x)$/i.test(sId)){
    return {isCarId: false, message: "你输入的身份证长度或格式错误"};
  }
  sId=sId.replace(/x$/i,"a"); 
  if(aCity[parseInt(sId.substr(0,2))]==null){
    return {isCarId: false, message: "你的身份证地区非法"};
  }
  let sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); 
  let d=new Date(sBirthday.replace(/-/g,"/")) ;
  if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate())){
    return {isCarId: false, message: "身份证上的出生日期非法"};
  }
  for(let i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ;
  if(iSum%11!=1){
    return {isCarId: false, message: "你输入的身份证号非法"};
  }
  return {isCarId: true, message: '对的'};
}

const isPhone = function(phone){
  return /^1[3|4|5|6|7|8|9][0-9]\d{8}$/.test(phone);
}

module.exports = { isCodeCar: isCodeCar, isPhone: isPhone}